Stop mechanism for drill-presses.



No. 857,207. PATENTED JUNE 18, 1907.

' s. c. SGHAUBR.

STOP MECHANISM FOR DRILL PRESSES.

APPLICATION FILED FEB.18. 1907.

WITNESSES, LS/Zdvwgm CQGcAMI/z. INVENTOR.

SHERMAN c. SCHAUER, F CINCINNATI, OHIO, ASSIGNOR to THE CINCINNATI-- T T Uhhitlhi.

MACHINETOOL COMPAN Y, CINCINNATI, QHIO, A COPARTNERSHIP.

. STOP MECHANISM FOR DRELD-PRESSESQ Specification of Letters Patent.

Patented June 18, ieov.

Application filed February 18,1907. Serial No- 367,842.

T0 whom it may concern: Y i

Be it known that I, SHERMAN C. SCH'AUER,

a citizen of the United States, residing at Cincinnati, Ohio, have invented a new and useful Improvement in Stop Mechanism for Drill-Presses, of whichv the following is a spigification.

invention relates to stop mechanism.

. for rill presses and the objects of nay/improvement are to provide means for instantly stopping the rotation of the spindle when it is disengaged from the driving mechanism and showihg the idler shifting arm; Fig. 5, arts in section on the line or-w of Fig. 2 SL116. Fig.

. 6 the side elevation of parts of a drill press without reversing gears and embodying my improvement.

In the drawings, 1 represents the-column of-an upright drill press, 2 the top yoke supported thereon and provided with viertical bearing 3, and 4 a bracket removably secured to the top yoke by means of ca screws 5'and provided with a bearing6 in a inement with said bearing 3. v 7

Similar bevel gears 7 and 8 are each provided with a clutch member 9 and with a proj ecting hub 11. whereby they are j oiu'naled in the respective bearings 3 and 6 ar'lll wherein they are retained by'means of collars 12. A

spindle 13 provided with a spline. groove 14 is rotatatively inserted through the. axial vations of the removable bracket, the latterbore of said gears and longitudinally adjust able therethrough by the usual mechanism (not shown). A driving shaft 15- journaied on the top yoke in bearings 16 is provided with a pulley 17, a spur gear 18 and a bevel pinion 19 in continuous mesh with bevel gear 7. A shaft21 joumaled in the bracket i is provided. with a spur gear 22 preferably smaller than gear 18 and with a bevel pinion 23 similar to pinion 19 which meshes continuously with bevel gear 8.

A flange 24 which projects laterally from one side of brackets and flush with. its face is provided with a gear hood 25 with a curved slot 26 concentric with shaft 21, and with a fixed stop or pin 27 projecting forwardly therefrom. A shifting arm 28. swiveled lat one end concentric with shaft 21 is provided with a stud or spindle 29 which carries on one end an idle spur gear 31 in continuous mesh with gear 22. ed at the other end through slot 26 in flange 24 and nut 32 is adjustably threaded thereon for imniovably clampingarin 28 against the flange in its dilierent ositions of adjustment.

Said arm is adjustab e with gear 31 into en gagement with gear 18 forsimultaneously rotating gear 8 in the opposite directionfrom gear 7. It is also adjustable with gear 31 into engagement with the fixed stop 27 for locking gear Sirom being rotated in either direction.

A sleeve 33 provided with clutch members 34 on its respective ends is spline-d on spindle 13 between bevel gears 7 and '8. A bell crank hand lever 35 pivoted in a fixed plate 36 which depends from bracket' 4 serves to move sleeve 33 into engagement with either,

of the gears 7 or 8. During the engagement of the sleeve with gear 7 the spindlel3 will be rotated in a forward direction, and during its engagement with gear 8 the spindlemdll be rotated at anaccelerated speed and in a rearward direction, provided the idle gear 31 is engaged with gear18. Shouldthe engage 'ment of the sleeve with gear Soccer during the engagement of idler 31 with the finedstop 27 the spindle 13- will be thereby instantly Said stud is movably extendstopped and locked in non-rotative position. In drill presses oi the class not provided with gear reversing mechanism, as shown in Fig. 6 the bevel gear 8 with its clutch mom her 9 may be dispensed with and a fixed clutehinember 37 substituted therefor on the bracket and adapted to engage with the corresponding clutcl'i member 34 on the sleeve for locking the s: Indie 13 in non-rotativc position.

The clutches may be either of the friction or positive class as desired but i prefer to use the friction clutches like the one shown and described in Patent No..756,185 granted to me on March 29, 1904:

Having fully described my improvement,

what I claim as my invention and desire to secure by Letters Patent of the United States is 1. The combination of a driven gear, a fixed stop, a longitudinally movable spindle, and means for engaging the spindle alternately with the gearand-with the stop- 2. The combination of a driven gear, a fixed stop, a longitudinally movable spindle, a sleeve splined thereon, and means for moving the s eeve in engagement with the gear and with the stop.

3. The combination of a driven gear provided with a clutch member, as indle rotatively and longitudinally-movab e therein, a sleeve splined thereon andprovided. With a clutch member adapted to enga e with the gear for rotating the spindle, an means for preventing the rotation of. the sleeve when disengaged from the gear.

4. The combination ofa top yoke, a driven gear, a longitudinally movable spindle, a bracket removably secured on the yoke, and means for detachably engaging the spindle with the bracket and with the gear.

5. The combination of a spindle, a driving and a reversing gear therefor, means for detachably engaging the spindle with either of said gears, and means for locking one of said gears in a non-rotative position.

6. The combination of a spindle, a driving and a reversing gear therefor, means for detachably engagin the spindle with either of said gears, a fixed stop, a train of gears connecting said gears together, and means for disconnecting a portion of said train from the driving gear and engaging it with the fixed sto 7 The combination of a driving shaft provided with a spur gear and with abevel pinion, a bevel gear engaging with the pinion, a t

ed with a smaller spur secondary shaft provi I gear and with a bevel pinion, a bevel gear engaging with said latter pinion, a fixed stop,

an idle spur gear in continuous-enga ement movable spindle, a rotative and a stationary member mounted concentric therewith at fixed points, andmeans -forenga ing the spindle with said members alternate y.

10. The combination of a'longitudinally movable spindle, a rotative -member,- a nonrotative member, and means for detachably engaging the spindle with either of said members at any point in its longitudinal movement.

11. The combination ofa longitudinally movable spindle, a rotative and a non-rotative member mounted-concentric therewith at fixed points,-and means for engaging the spindle indifferent rotative or longitudinal positions with either of-said members.

12. The co'mbinationof a longitudinally and ro-t atively-movable spindle, -a' rotative.

driving member therefor, a non-rotativ member, and means for detachably engagin the spindle in any rotativeor longitudina position with either of said members.

13. The combination of a longitudinally and rotatively movable spindle, a rotative member, a non-rotative member, and means for engaging the spindle in an}; dinal or rotative posltionswit alternately.

' SHERMAN CJSQHAUER, I

saidmembers Witnesses:

a -AUG. H. TUEonTER,

R. S. CARR.

of-its longitu- 

